I do. Driving 61 instead of 48 km/h increases your distance to stop at an emergency by almost 8m. This is assuming 300ms reaction time. By the time you would have stopped at 48km/h you would still be ramming whatever it is you’re emergency braking for with 40km/h if you go 61km/h.

In other words, the child that ran on the street would be dead.

Speeding is no joke, please read about how braking distance scales with speed.